초록 ▼

Two light signals pass through a series connection of a first multimode optical fiber, a first polarizer, a Faraday sensor device, a second polarizer an a second multimode optical fiber in opposite directions. The polarization axes of the two polarizers are set at a polarizer angle .eta. or .theta.

Two light signals pass through a series connection of a first multimode optical fiber, a first polarizer, a Faraday sensor device, a second polarizer an a second multimode optical fiber in opposite directions. The polarization axes of the two polarizers are set at a polarizer angle .eta. or .theta. to the natural axis of the linear birefringence in the sensor device with cos(2.eta.+2.theta.)=-2/3. The measuring signal is derived as the quotient of two linear functions of the light intensities of the two light signals after passing through the series connection.

대표청구항 ▼

[ What is claimed is:] [6.] An arrangement for measuring a magnetic field comprising:an optical series connection comprising a first optical transmission link, a first polarizer, a sensor device that exhibits the Faraday effect, a second polarizer and a second optical transmission link;means for tra

[ What is claimed is:] [6.] An arrangement for measuring a magnetic field comprising:an optical series connection comprising a first optical transmission link, a first polarizer, a sensor device that exhibits the Faraday effect, a second polarizer and a second optical transmission link;means for transmitting a first light signal and a second light signal through the series connection so that the first light signal and the second light signal pass through the series connection in opposite directions; andat least one analyzing device for deriving a measuring signal for the magnetic field that corresponds to a first quotient equaling one of two linear functions, of a pair of light intensities of the first and second light signals after each has passed through the optical series connection, divided by the other,wherein a first polarization axis of the first polarizer is rotated by a first polarizer angle in relation to a natural axis of the linear birefringence in the sensor device and a second polarization axis of the second polarizer is rotated by a second polarizer angle in relation to the natural axis, the first and second polarizer angles substantially satisfying the equation cosine(2.multidot.first polarizer angle+2.multidot.second polarizer angle)=-2/3.